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Theorem psubclssatN 37692
Description: A closed projective subspace is a set of atoms. (Contributed by NM, 25-Jan-2012.) (New usage is discouraged.)
Hypotheses
Ref Expression
psubclssat.a 𝐴 = (Atoms‘𝐾)
psubclssat.c 𝐶 = (PSubCl‘𝐾)
Assertion
Ref Expression
psubclssatN ((𝐾𝐷𝑋𝐶) → 𝑋𝐴)

Proof of Theorem psubclssatN
StepHypRef Expression
1 psubclssat.a . . 3 𝐴 = (Atoms‘𝐾)
2 eqid 2737 . . 3 (⊥𝑃𝐾) = (⊥𝑃𝐾)
3 psubclssat.c . . 3 𝐶 = (PSubCl‘𝐾)
41, 2, 3psubcliN 37689 . 2 ((𝐾𝐷𝑋𝐶) → (𝑋𝐴 ∧ ((⊥𝑃𝐾)‘((⊥𝑃𝐾)‘𝑋)) = 𝑋))
54simpld 498 1 ((𝐾𝐷𝑋𝐶) → 𝑋𝐴)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 399   = wceq 1543  wcel 2110  wss 3866  cfv 6380  Atomscatm 37014  𝑃cpolN 37653  PSubClcpscN 37685
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1803  ax-4 1817  ax-5 1918  ax-6 1976  ax-7 2016  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2158  ax-12 2175  ax-ext 2708  ax-sep 5192  ax-nul 5199  ax-pow 5258  ax-pr 5322
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 848  df-3an 1091  df-tru 1546  df-fal 1556  df-ex 1788  df-nf 1792  df-sb 2071  df-mo 2539  df-eu 2568  df-clab 2715  df-cleq 2729  df-clel 2816  df-nfc 2886  df-ral 3066  df-rex 3067  df-rab 3070  df-v 3410  df-dif 3869  df-un 3871  df-in 3873  df-ss 3883  df-nul 4238  df-if 4440  df-pw 4515  df-sn 4542  df-pr 4544  df-op 4548  df-uni 4820  df-br 5054  df-opab 5116  df-mpt 5136  df-id 5455  df-xp 5557  df-rel 5558  df-cnv 5559  df-co 5560  df-dm 5561  df-iota 6338  df-fun 6382  df-fv 6388  df-psubclN 37686
This theorem is referenced by:  pmapidclN  37693  psubclinN  37699  paddatclN  37700  pclfinclN  37701  poml6N  37706  osumcllem3N  37709  osumcllem9N  37715  osumcllem11N  37717  osumclN  37718
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